<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>箭头函数</title>
</head>

<body>

</body>
<script>
    var func = (a, b) => {
        let sum = a + b;
        return sum;
    }
    var i = func(1, 2);
    console.log(i);
</script>

</html>